Use case base64 encode before save and decode on display

Server-Side Components/Business Rules/Use_case_Base64-Encode-Before-Save-And-Decode-on-Display/Before_BR_script.js

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+
+
+//Encode Before Saving Trigger: Before Insert/Update
+
+(function executeRule(current, previous) {
+    if (current.fieldName.changes()) {
+        var plainText = current.fieldName + '';
+        current.fieldName = GlideStringUtil.base64Encode(plainText);
+    }
+})(current, previous);
+//If the field is new or updated, encodes its value to Base64. Saves the encoded string to the database.
+
+// For Example User enters Hello World in fieldName.
+//Before saving : System encodes and stores SGVsbG8gV29ybGQ= in the database.
+//When the record is viewed : Display rule decodes it back to Hello World for the user.
+
+

Server-Side Components/Business Rules/Use_case_Base64-Encode-Before-Save-And-Decode-on-Display/Display_BR_script.js

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+// Decode on Display Trigger: Before Display
+////Decodes fieldName from Base64. Shows decoded value on the form.
+
+(function executeRule(current) {
+    if (current.fieldName) { // field name can be anything
+        try {
+            var decoded = GlideStringUtil.base64Decode(current.fieldName);
+            current.setDisplayValue('fieldName', decoded);
+        } catch (ex) {
+            current.setDisplayValue('fieldName', '[Invalid Base64]');
+        }
+    }
+})(current);   
+
+//If the field is new or updated, encodes its value to Base64. Saves the encoded string to the database.
+
+// For Example User enters Hello World in fieldName.
+//Before saving : System encodes and stores SGVsbG8gV29ybGQ= in the database.
+//When the record is viewed : Display rule decodes it back to Hello World for the user.

Server-Side Components/Business Rules/Use_case_Base64-Encode-Before-Save-And-Decode-on-Display/Readme.md

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+Base64 Encode/Decode Business Rule
+Overview
+
+This setup demonstrates how to store field data securely in Base64 format in the database, while still displaying it as human-readable text to end users in ServiceNow.
+
+It uses two Business Rules:
+
+Before Insert/Update Rule : Encodes plain text into Base64 before saving to the database.
+
+Display Rule  : Decodes the Base64 value back into readable text when loading the record form.